Extension cords and power strips are safe for most home and office electronics, but for many appliances, they can be a bad idea.

Extension cords can be a great way to improve productivity and convenience, but it's important to know the dangers of what not to plug into one.

If you're thinking about pulling out an extension cord to remedy this issue, think again. "A lot of people don't have knowledge of extension cords," Paul Martinez, owner of Electrified NYC, in Brooklyn,